Across
1
Longest side of a right triangle
6
Number with digits after a point
7
The number representing nothing
11
Math using letters for unknown values
14
Three-sided polygon
Down
2
System of ordered marks for measuring
3
Comparison of two quantities
4
Round shape with all points equidistant
5
Visual representation of data
8
Mathematical rule or equation
9
Closed shape with straight sides
10
Result of addition
12
Line touching circle at one point
13
Line segment connecting two circle points